package com.hmdp.service.impl;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.util.RandomUtil;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hmdp.dto.LoginFormDTO;
import com.hmdp.dto.Result;
import com.hmdp.dto.UserDTO;
import com.hmdp.entity.User;
import com.hmdp.mapper.UserMapper;
import com.hmdp.service.IUserService;
import com.hmdp.utils.RegexUtils;
import io.netty.util.internal.shaded.org.jctools.util.RangeUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.http.HttpSession;

import static com.hmdp.utils.SystemConstants.USER_NICK_NAME_PREFIX;

/**
 * <p>
 * 服务实现类
 * </p>
 *
 * @author 虎哥
 * @since 2021-12-22
 */
@Slf4j
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {

//    @Autowired
//    private UserMapper userMapper;
    
    @Override
    public Result sendCode(String phone, HttpSession session) {
        //1.校验手机号
        if (RegexUtils.isPhoneInvalid(phone)){
            //2.如果不符合，返回错误信息
            return Result.fail("手机号格式错误！！！");
        }
        //3.符合，生成验证码
        String code = RandomUtil.randomNumbers(6);
        
        //4.保存验证码
        session.setAttribute("code",code);
        //5.发送验证码、模拟验证码
        log.debug("发送验证码成功，验证码{}",code);
        //返回ok
        return Result.ok();
    }

    @Override
    public Result login(LoginFormDTO loginForm, HttpSession session) {
        //1.校验手机号码
        String phone = loginForm.getPhone();
        if (RegexUtils.isPhoneInvalid(phone)){
            //2.如果不符合，返回错误信息
            return Result.fail("手机号格式错误！！！");
        }
        //2.校验验证码
        Object cacheCode = session.getAttribute("code");//获取session验证码
        String code = loginForm.getCode();  //获取表演提交的验证码
        if(cacheCode == null || !cacheCode.toString().equals(code)){
            //3.session为空、不一致，报错
            return Result.fail("验证码错误！！！");
        }
        //4.一致，根据手机号查询用户 
//        QueryWrapper<User> queryWrapper = new QueryWrapper<>();
//        queryWrapper.eq("phone", phone);
//        User user = userMapper.selectOne(queryWrapper);
        User user = query().eq("phone", phone).one();
        
        //5.判断用户是否存在
        if(user == null){
            //6.不存在，创建新用户并保存
            user = createUserWithPhone(phone);
        }
        //7.保存用户信息到session 
        //将user的属性拷贝到userdto 
        UserDTO userDTO = BeanUtil.copyProperties(user,UserDTO.class);
        session.setAttribute("user", userDTO);
        return Result.ok();
    }

    private User createUserWithPhone(String phone) {
        //1.创建用户
        User user = new User();
        user.setPhone(phone);
        user.setNickName(USER_NICK_NAME_PREFIX+RandomUtil.randomString(10));
        //2.保存用户信息
        save(user);
        return user;
    }
}
